Meaning of the code %let SafeMode=0; ?

[Phil_NZ]

Hi all SAS Users,

Today I had a chance to read some codes from other published papers. And I stuck at the first line

The first line is

%let SafeMode=0;

They explain it like that but I did not understand, could you please explain it to me? I did a search from google but no document available for this code?

/* Changing Safemode parameter to 1 would add few additional filters.  (default=0)
It is inactive in the default settings. It might be useful for first look at new datasets */
%let SafeMode=0;	

I know %let is used to assign a value for one variable, but do not know more than that for this code.

Warmest regards,

[ChrisNZ · Accepted solution]

The program assigns a value of 0 to macro variable SafeMode.

What effect this has should be determined from the comment provided, and from how the macro is used.

It is a user-created variable and how it's used is entirely up to the person who used it.

[ballardw]

If you have the entire code of the macro I will bet that you find at least one instance of

%if &safemode=1 %then <other code>

or

%if &safemode=0 %then <other code>

if not both. What comes after the IF is what the macro variable is controlling.

[Phil_NZ]

Hi @ballardw 

You are right! There are some lines of code exactly what you mentioned

%if &safemode=1 %then <other code>

Warm regards.